In Goethe’s original triangle the three primaries red, yellow, and blue are arranged at the vertices of the triangle. The other subdivisions of the triangle are grouped into secondary and tertiary triangles, where the secondary triangle colors represent the mix of the two primary triangles to either side of it, and the tertiary triangle colors represent the mix of the primary triangle adjacent to it and the secondary triangle directly across from it.

★★★★★

"My 3 year old daughter had fun shaking and playing. Unlike other apps, Sound Sketchbook is 'comforting' for the parents because its highly child-friendly and lets your child hear soothing sounds. So I can give my iPhone to my child with Sound Sketchbook with no worries. Highly educational for children to get used to graphical forms and musical sensibilities."